Make sure isinstance(typing_extensions.ParamSpec("P"), typing.TypeVar) is unaffected by sys.setprofile()#407
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| cd ${path_to_file%.tar.gz}/src | ||
| python test_typing_extensions.py |
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I had to make this change or the subprocess wasn't able to import typing_extensions. It was raising ModuleNotFoundError
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With your change it uses the copy of typing_extensions in the repo instead of the installed one; that is incorrect. We shouldn't do this.
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I see, thanks. Do you have any idea why the subprocess wasn't able to import typing_extensions prior to this change, but only for this CI job? I don't fully understand that (see https://github.com/python/typing_extensions/actions/runs/9197903212/job/25299411282?pr=407)
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Oh actually, this might be fine, since in this job we're not attempting to test an installed version of typing_extensions. I'm not actually sure why this doesn't work in CI though. Possibly the test itself is picking up the wrong copy of typing_extensions.
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I'm actually not sure how the pre-existing tests currently pass without this? I think it's correct? Otherwise we unpack the version of typing_extensions we want into an src/ directory, but never cd into that src directory, right?
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Yes, that's what it looks like.
| try: | ||
| proc = subprocess.run( | ||
| [sys.executable, "-c", code], check=True, capture_output=True, text=True, | ||
| ) | ||
| except subprocess.CalledProcessError as exc: | ||
| print("stdout", exc.stdout, sep="\n") | ||
| print("stderr", exc.stderr, sep="\n") | ||
| raise |
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I tried running this in an isolated scope using exec(), but it was still causing some pollution of the global environment that was causing other, unrelated tests to fail. This seems to be the only way of doing a test with total interpreter isolation.
AlexWaygood
changed the title
isinstance(typing_extensions.ParamSpec("P"), typing.TypeVar) is unaffected by profiling functionsisinstance(typing_extensions.ParamSpec("P"), typing.TypeVar) is unaffected by sys.setprofile()
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The 4.12.0 release should go out today, do you think it's better to merge this in now or wait for the next release? The change seems pretty safe so I think it's fine to merge now in the RC phase. |
Oh shoot, sorry -- I merged before seeing this. I think it's okay to put it into the next release; I agree that this change seems pretty safe. But I also don't think that this issue affects many people, so I would also be fine with cutting the release based on the commit prior to this. |
2 participants
Fixes #318. The workaround here is to avoid the
super()call -- thesuper()call accesses the__class__variable from the__init__method, which due to a CPython bug on Python <=3.10 means that__class__is removed fromParamSpec.__dict__if a profiling function has been set.